TY  - JOUR
AU  - Verevkin, A.
AU  - Zhang, J.
AU  - Sobolewski, Roman
AU  - Lipatov, A.
AU  - Okunev, O.
AU  - Chulkova, G.
AU  - Korneev, A.
AU  - Smirnov, K.
AU  - Gol'tsman, G. N.
AU  - Semenov, A.
PY  - 2002
DA  - 2002//
TI  - Detection efficiency of large-active-area NbN single-photon superconducting detectors in the ultraviolet to near-infrared range
JO  - Appl. Phys. Lett.
SP  - 4687
EP  - 4689
VL  - 80
IS  - 25
KW  - NbN SSPD
KW  - SNSPD
KW  - QE
AB  - We report our studies on spectral sensitivity of meander-type, superconducting NbN thin-film single-photon detectors (SPDs), characterized by GHz counting rates of visible and near-infrared photons and negligible dark counts. Our SPDs exhibit experimentally determined quantum efficiencies ranging from ∼0.2% at the 1.55 μm wavelength to ∼70% at 0.4 μm. Spectral dependences of the detection efficiency (DE) at the 0.4 to 3.0-μm-wavelength range are presented. The exponential character of the DE dependence on wavelength, as well as its dependence versus bias current, is qualitatively explained in terms of superconducting fluctuations in our ultrathin, submicron-width superconducting stripes. The DE values of large-active-area NbN SPDs in the visible range are high enough for modern quantum communications.
UR  - https://doi.org/10.1063/1.1487924
DO  - 10.1063/1.1487924
N1  - exported from refbase (https://db.rplab.ru/refbase/show.php?record=331), last updated on Fri, 21 May 2021 12:48:49 -0500
ID  - Verevkin_etal2002
ER  -